Hydraulics and Fluid Mechanics in ME
Which of the following is an incorrect statement ?

None of these
Discharge is independent of orientation of venturimeter whether it is horizontal, vertical or inclined
Flow nozzle is cheaper than venturimeter but has higher energy loss
Coefficient of contraction of a venturimeter is unity

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Hydraulics and Fluid Mechanics in ME
A compound pipe of diameter d1, d2 and d3 having lengths l1, l2 and l3 is to be replaced by an equivalent pipe of uniform diameter d and of the same length (l) as that of the compound pipe. The size of the equivalent pipe is given by

l/d⁴ = (l₁/d₁⁴) + (l₂/d₂⁴) + (l₃/d₃⁴)
l/d³ = (l₁/d₁³) + (l₂/d₂³) + (l₃/d₃³)
l/d² = (l₁/d₁²) + (l₂/d₂²) + (l₃/d₃²)
l/d⁵ = (l₁/d₁⁵) + (l₂/d₂⁵) + (l₃/d₃⁵)

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Hydraulics and Fluid Mechanics in ME
If a vessel containing liquid moves downward with a constant acceleration equal to ‘g’ then

the pressure throughout the liquid mass is atmospheric
there will be vacuum in the liquid
the pressure in the liquid mass is greater than hydrostatic pressure
None of these

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